Closure with axial pull protection for connectorized cables

ABSTRACT

A closure ( 100 ) is configured to hold one or more termination arrangements ( 120 ) at which one or more connectorized ends of optical cables can be received. The closure ( 100 ) provides axial pull-out protection for the connectorized ends ( 142 ) of the optical cables ( 140 ). In certain implementations, the closure ( 100 ) provides axial pull-out protection for the connectorized ends ( 142 ) of optical cables ( 140 ) arranged in multiple layers within the closure ( 100 ). In certain implementations, the closure ( 100 ) provides axial pull-out protection for standard optical connectors (e.g., standard SC connectors, standard LC connectors, standard LX.5 connectors, standard MPO connectors, etc.). The axial pull-out protection can be in the form of a cover ( 130 ). Cable bend protection ( 136 ) may also be provided by the cover.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a Continuation of U.S. patent application Ser. No. 15/560,121, filed on Sep. 20, 2017, now U.S. Pat. No. 10,429,595, which is a National Stage Application of PCT/EP2016/056068, filed on Mar. 18, 2016, which claims the benefit of U.S. Patent Application Ser. No. 62/136,256, filed on Mar. 20, 2015, the disclosures of which are incorporated herein by reference in their entireties. To the extent appropriate, a claim of priority is made to each of the above disclosed applications.

SUMMARY

The present invention relates to a closure configured to hold one or more termination arrangements at which one or more connectorized ends of optical cables can be received. The closure provides axial pull-out protection for the connectorized ends of the optical cables. In certain implementations, the closure provides axial pull-out protection for the connectorized ends of optical cables arranged in multiple layers within the closure. In certain implementations, the closure provides axial pull-out protection for standard optical connectors (e.g., standard SC connectors, standard LC connectors, standard LX.5 connectors, standard MPO connectors, etc.). The axial pull-out protection can be in the form of a cover. Cable bend protection may also be provided by the cover.

A variety of additional inventive aspects will be set forth in the description that follows. The inventive aspects can relate to individual features and to combinations of features. It is to be understood that both the forgoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad inventive concepts upon which the embodiments disclosed herein are based.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the description, illustrate several aspects of the present disclosure. A brief description of the drawings is as follows:

FIG. 1 is a perspective view of an example closure at which optical cables can be received at internal ports;

FIG. 2 is a front elevational view of the closure of FIG. 1;

FIG. 3 is a perspective view of the closure of FIG. 1 with a cover of the closure made transparent to allow viewing of optical adapters and optical connectors disposed within the closure;

FIG. 4 is a front perspective view of the cover of the closure of FIG. 1;

FIG. 5 is a rear perspective view of the cover of FIG. 4;

FIG. 6 is a side elevational view of the closure of FIG. 3; and

FIG. 7 is a cross-sectional view of the closure of FIG. 6 taken along the 7-7 line of FIG. 6.

DETAILED DESCRIPTION

Reference will now be made in detail to exemplary aspects of the present disclosure that are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

The figures illustrate an example closure 100 (FIG. 1) configured to hold one or more termination arrangements 120 (FIG. 3) at which one or more connectorized ends of optical cables can be received. The closure 100 provides axial pull-out protection for the connectorized ends 142 of the optical cables 140. In certain implementations, the closure 100 provides axial pull-out protection for the connectorized ends 142 of optical cables 140 arranged in multiple layers within the closure 100. In certain implementations, the closure 100 provides axial pull-out protection for standard optical connectors (e.g., standard SC connectors, standard LC connectors, standard LX.5 connectors, standard MPO connectors, etc.).

As shown in FIGS. 1 and 2, the closure 100 has a depth D extending between a front 101 and a rear 102, a width W extending between a first side 103 and a second side 104, and a length L extending between a top 105 and a bottom 106. It is noted that the terms “front,” “rear,” “top,” and “bottom” are not intended to imply an orientation for the closure 100, but rather are used for convenience and clarity. In the example shown, the optical cables 140 extend into the closure 100 through the bottom 106. In other examples, however, the optical cables 140 can enter the closure 100 through other sides. In the example shown, an input cable can pass through the top 105 of the closure 100, the bottom 106 of the closure 100, or both (e.g., if less than all of the optical fibers of the input cable are utilized at the closure 100).

As shown in FIG. 3, the closure 100 includes a base 100 and a cover 130 that cooperate to define an interior 107 in which the termination arrangement 120 is disposed. In certain implementations, the axial pull-protection is integrated into the cover 130. Accordingly, removing the cover 130 from the base 110 provides full access to the connectorized ends 142 of the optical cables 140. Mounting the cover 130 to the base 110 provides the axial pull-protection to the connectorized ends 142 of any optical cable 140 held within the closure 100.

In the example shown, the base 110 defines the rear 102 of the closure 100 and the cover 130 defines the front 101 of the closure 100. In other examples, however, the base 110 and cover 130 can define or cooperate to define other sides of the closure 100. The base 110 defines an input cable channel 113 and the cover 130 defines an input cable channel 133. The input cable channels 113, 133 of the base 110 and cover 130 cooperate to define an input cable passage when the cover 130 is mounted to the base 110. In the example shown, the input cable channels 113, 133 are defined in both the top 105 and bottom 106 of the base 110 and cover 130. In other examples, only one of the top 105 and bottom 106 may define the channels 113, 133.

In some implementations, the cover 130 defines an aperture 135 through which the optical cables 140 extend. In the example shown, the aperture 135 is defined at a bottom 106 of the cover 130. In other implementations, the base 110 cooperates with the cover 130 to define the aperture 135. In still other implementations, the base 110 can define the aperture through which the optical cables 140 extend.

The base 110 is configured to mount to a surface (e.g., a wall). In certain implementations, the base 110 includes attachment members 111 defining fastening apertures 112 that facilitate mounting the base 110 to a surface. The cover 130 removably mounts to the base 110. In certain implementations, the cover 130 is slidable relative to the base 110. In the example shown, the cover 130 is configured to slide relative to the base 110 in a forward direction to remove the cover 130 and in a rearward direction to mount the cover 130.

The termination arrangement 120 mounts to the base 110 and includes a housing 121 carrying one or more termination adapters 122. In some implementations, the termination arrangement 120 also includes other components, such as an optical splitter, a wave division multiplexer, and optical fiber management members (e.g., cable spools, bend radius limiters, etc.). In an example, the termination arrangement is a splitter module including optical adapters 122 having inner ports at which split signals are received. The inner ports align with output ports 125 of the adapters 122 to allow optical coupling of optical fibers received thereat. In the example shown, the output ports 125 face towards the aperture 135 through which the cables 140 extend.

In certain implementations, the termination arrangement 120 includes multiple adapters 122 disposed along the width W of the closure 100. In certain implementations, the termination arrangement 120 can include adapters 122 arranged in layers along the depth D of the closure 100. In the example shown in FIG. 3, the termination arrangement 120 includes four layers of adapters 122 with each layer including four adapters 122. In other examples, the termination arrangement 120 can have a different number of layers (e.g., one layer, two layers, three layers, six layers, etc.) and/or a different number of adapters 122 in each layer. In the example shown, the adapters 122 in each layer are aligned in a row. In the example shown, the layers are arranged so that the adapters 122 form columns along the depth D of the closure 100.

In certain implementations, the optical connectors 142 include a connector body 143 configured to hold an optical fiber (e.g., with a ferrule) and a strain-relief boot. In examples, the strain-relief boot is disposed rearward of the connector body 143. In the example shown, the optical connectors 142 are standard SC connectors. For example, in such an example, the termination adapters 122 include internal latching members that engage latching openings on the SC connectors 142. The SC connectors 142 are removed by pulling on outer grip housings of the connectors 142. In other examples, however, other types of optical connectors 142 may be utilized (e.g., LC connectors, MPO connectors, LX.5 connectors, etc.).

FIGS. 4 and 5 illustrate an example cover 130 configured to provide axial pull-protection to the cables 140 plugged into the adapters 142. The cover 130 includes a side wall 142 extending rearwardly from a front wall 131. A bottom of the sidewall 142 defines the aperture 135. At least a top of the sidewall 142 defines the input cable channel 133. A locking arrangement can be provided to secure the cover 130 to the base 110. For example, the front wall 131 of the cover 130 may define an opening 134 through which a lock or fastener may extend to secure the cover 130.

The cover 130 includes one or more guide elements 136 extending rearwardly from the front wall 131. In certain implementations, the guide elements 136 extend in a row along the width W of the closure 100. The guide elements 136 cooperate to define passages P through which the optical cables 140 pass when routed through the aperture 135 and to the termination arrangement 120. The passages P are vertically aligned with the output ports 125 of the adapters 122. In certain implementations, each guide element 136 includes one or more guide walls 138. Each guide wall 138 opposes a guide wall 138 of an adjacent guide element 136 to define one of the passages P.

In certain implementations, each guide element 136 defines a transition surface 139 that faces the aperture 135. In certain examples, each transition surface 139 extends away from one or more the guide walls 138 in a curve that provides bend radius protection to cables 140 extending through the aperture 135. In the example shown, three of the guide elements 136 each include a transition surface 139 that connects two guide walls 138. Two of the guide elements 136 define a transition surface 139 that extends away from a single guide wall 138. The guide elements with a single guide wall 138 are disposed on opposite sides of the guide elements 136 having two guide walls 138. In other examples, each of the guide elements 136 may have two guide walls 138.

In certain implementations, each guide element 136 defines one or more support surfaces 137 that face towards the output ports 125 of the adapters 122. The guide elements 136 are sized and positioned so that the support surfaces 137 align with the optical connectors 142 terminating the optical cables 140 when the optical connectors 142 are received at the output ports 125 and the cover 130 is mounted on the base 110. In certain implementations, the support surfaces 137 are defined at the tops of the guide walls 138. In other implementations, the support surfaces 137 are defined by platforms extending upwardly from the guide walls 138 or other portions of the guide elements 136.

As shown in FIGS. 6 and 7, mounting the cover 130 to the base 110 positions the guide elements 136 relative to the output ports 125 so that at least portions of the support surfaces 137 of the guide elements 136 vertically align with the output ports 125. Any optical connectors 142 received at the output ports 125 extend downwardly towards the guide elements 136. The guide elements 136 are horizontally positioned (e.g., along the width W of the closure 100) relative to the output ports 125 so that the cables 140 pass through the passages P without bending. In certain implementations, the guide elements 136 are vertically positioned so that the strain-relief boots 145 of the cables 140 extend through the passages P. By vertically aligning the passages P with the strain-relief boots 145, squeezing or pinching of the optical cables 140 (e.g., by the guide walls 138 or other portions of the guide elements 136) is inhibited.

The guide elements 136 are vertically positioned (e.g., along the length L of the closure 100) so that the support surfaces 137 engage or almost engage the rear edges 144 of the connector housings 143 of any optical connectors 142 received at the output ports 125. In certain implementations, the rear edge 144 of each optical connector housing 143 engages support surfaces 137 of two guide elements 136. For example, the rear edge 144 may straddle the gap between two adjacent guide elements 136 to engage respective support surfaces 137 (e.g., see FIG. 7). In certain implementations, the support surfaces 137 extend along a depth D of the cover 130 so that each support surface 137 can engage the rear edge 144 of multiple optical connectors 142 (e.g., arranged in multiple layers). For example, each support surface 137 can engage the rear edges 144 of optical connectors 142 arranged in a column along the depth D of the closure 100.

In certain implementations, the adapters 122 are carried by the termination arrangement 120 so that the adapters 122 can move vertically relative to the housing 121 of the termination arrangement 120. Accordingly, when the cover 130 applies an upward pressure on the connectors 142 received at the output ports 125, the connectors 142 can apply an upward pressure on the adapters 122 to move the adapters 122 into the housing 121. Allowing the adapters 122 to so move ensures that an axial pull-load is taken by the support surfaces 137 of the guide elements 136 despite manufacturing tolerances of the closure 100 and connectors 142.

As shown, support surfaces 137 and guide walls 138 extend generally axially relative to the connector and adapter axes, resulting in strong and robust support by the cover 130 on the one or more layers of connectors 142 in the termination arrangement 120. As shown, the rear edge 144 of the optical connectors 142 (e.g., arranged in one layer or multiple layers) are each engaged by a support surface 137 on opposite sides of each connector, along an axial direction. In the illustrated example, the rear edges 144 of optical connectors 142 are the rear edges of the grip of the SC connectors. The grip is the outer housing portion of the connector 142 which controls latching and unlatching of the connector 142 with the 122 of a conventional SC connector.

To insert or remove a connector 142 to or from the closure 100, the cover 130 is removed from the base 110. For example, the cover 130 can be slid forwardly relative to the base 110. Removing the cover 130 removes the guide elements 136 from between the cables 140. Removing the guide elements 136 removes the support surfaces 137 from the connector housings 143. Accordingly, removing the cover 130 provides full access to the optical connectors 142 and output ports 125 of the adapters 122. Any of the optical connectors 142 can then be removed from one of the output ports 125 (e.g., by pulling on a grip housing of the optical connector 142). Mounting the cover 130 to the base 110 engages the support surfaces 137 with the connector housings 143.

The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.

LIST OF REFERENCE NUMERALS AND CORRESPONDING FEATURES

-   100 closure -   101 front -   102 rear -   103 first side -   104 second side -   105 top -   106 bottom -   107 interior -   110 base -   111 attachment members -   112 fastening aperture -   113 input cable channel -   120 termination arrangement -   122 termination adapters -   125 output ports -   130 cover -   131 front wall -   132 side walls -   133 input channel -   134 opening -   135 aperture -   136 guide elements -   137 support surfaces -   138 guide walls -   139 transition surface -   140 Cables -   142 optical connectors -   143 connector housing -   144 rear edge -   145 boot 

What is claimed is:
 1. A telecommunications closure comprising: a base holding an optical adapter and defining an access opening, the optical adapter defining opposite first and second ports; a cover that cooperates with the base to define an interior having a height, a width, and a depth that are transverse to each other, the cover being movable relative to the base between an open position and a closed position, the cover blocking access to the optical adapter through the access opening when in the closed position, the cover allowing access to the optical adapter through the access opening when in the open position, the cover having an inner surface and an opposite outer surface, the inner surface of the cover facing the base and the outer surface of the cover facing away from the base when the cover is disposed in the closed position, the cover and the base also cooperating to define a cable port that is aligned with the first port of the optical adapter, the cable port being closer to the first port of the optical adapter than to the second port of the optical adapter; and a support member carried by the inner surface of the cover to move with the cover between the open and closed positions, the support member being offset from the first port of the optical adapter along the height of the interior towards the cable port and partially overlapping the first port of the optical adapter along the width of the interior.
 2. The telecommunications closure of claim 1, wherein the support member includes a guide section that extends in an orientation along the height of the interior, the guide section defining a transition surface that provides bend radius protection at the cable port.
 3. The telecommunications closure of claim 1, wherein the support member is a first support member; and wherein a second support member is also carried by the inner surface of the cover to move with the cover between the open and closed positions, the second support member being offset from the first port of the optical adapter along the height of the interior by a common distance with the first support member.
 4. The telecommunications closure of claim 3, wherein the second support member partially overlaps the first port of the optical adapter along the width of the interior, the first and second support members being disposed at opposite sides of the first port.
 5. The telecommunications closure of claim 3, wherein each of the first and second support members includes a respective guide section that extends in an orientation along the height of the interior, the guide sections of the first and second support members each defining a respective transition surface that provides bend radius protection at the cable port.
 6. The telecommunications closure of claim 5, wherein the transition surfaces of the first and second support members curve away from each other.
 7. The telecommunications closure of claim 1, wherein the support member is offset from the first port along the height of the interior by a distance a body of a connector plug protrudes from the first port when the connector plug is received at the first port.
 8. The telecommunications closure of claim 1, wherein the optical adapter is one of a plurality of optical adapters held by the base, each of the optical adapters having respective first and second ports.
 9. The telecommunications closure of claim 8, wherein the optical adapters are disposed in a row along the width of the interior.
 10. The telecommunications closure of claim 9, wherein the support member is one of a plurality of support members carried by the inner surface of the cover, each of the support members being offset from the first port of a respective one of the optical adapters along the height of the interior and partially overlapping the first port of the respective optical adapter along the width of the interior.
 11. The telecommunications closure of claim 8, wherein the optical adapters are disposed in a row along the depth of the interior.
 12. The telecommunications closure of claim 11, wherein the support member extends sufficiently along the depth of the interior to partially overlap the first port of each of the optical adapters in the row.
 13. The telecommunications closure of claim 8, wherein the optical adapters are layered in a plurality of rows, each row extending along the width of the interior.
 14. The telecommunications closure of claim 13, wherein the support member is one of a plurality of support members carried by the inner surface of the cover, each of the support members partially overlapping the first port of at least one respective one of the optical adapters in each row along the width of the interior.
 15. The telecommunications closure of claim 14, wherein each of the support members is offset from the first port of each respective one of the optical adapters along the height of the interior.
 16. The telecommunications closure of claim 14, wherein outer ones of the support members partially overlap only one of the optical adapters of each row; and inner ones of the support members partially overlap two of the optical adapters of each row.
 17. The telecommunications closure of claim 8, wherein the support member partially overlaps the first port of two of the optical adapters.
 18. The telecommunications closure of claim 8, wherein the support member is one of a plurality of support members, and wherein the support members divide the cable port into a plurality of guide channels, each guide channel aligning with the first port of each of the optical adapters.
 19. The telecommunications closure of claim 1, wherein the cover pivots relative to the base.
 20. The telecommunications closure of claim 19, wherein a pivot axis of the cover is disposed at an opposite end of the interior from the cable port.
 21. A telecommunications closure comprising: a base holding an optical adapter and defining an access opening, the optical adapter defining opposite first and second ports; a cover that cooperates with the base to define an interior having a height, a width, and a depth that are transverse to each other, the cover being movable relative to the base between an open position and a closed position, the cover blocking access to the optical adapter through the access opening when in the closed position, the cover allowing access to the optical adapter through the access opening when in the open position, the cover having an inner surface and an opposite outer surface, the inner surface of the cover facing the base and the outer surface of the cover facing away from the base when the cover is disposed in the closed position, the cover and the base also cooperating to define a cable port that is aligned with the first port of the optical adapter; and a support member carried by the inner surface of the cover to move with the cover between the open and closed positions, the support member being offset from the first port of the optical adapter along the height of the interior by a distance a body of a connector plug protrudes from the first port when the connector plug is received at the first port, and the support member partially overlapping the first port of the optical adapter along the width of the interior.
 22. A telecommunications closure comprising: a base holding an optical adapter and defining an access opening, the optical adapter defining opposite first and second ports; a cover that cooperates with the base to define an interior having a height, a width, and a depth that are transverse to each other, the cover being movable relative to the base between an open position and a closed position, the cover blocking access to the optical adapter through the access opening when in the closed position, the cover allowing access to the optical adapter through the access opening when in the open position, the cover having an inner surface and an opposite outer surface, the inner surface of the cover facing the base and the outer surface of the cover facing away from the base when the cover is disposed in the closed position, the cover and the base also cooperating to define a cable port that is aligned with the first port of the optical adapter; and a first support member carried by the inner surface of the cover to move with the cover between the open and closed positions, the support member being offset from the first port of the optical adapter along the height of the interior and partially overlapping the first port of the optical adapter along the width of the interior, the first support member including a respective guide section that extends in an orientation along the height of the interior, the guide section of the second support member defining a respective transition surface that provides bend radius protection at the cable port; a second support member carried by the inner surface of the cover to move with the cover between the open and closed positions, the second support member being offset from the first port of the optical adapter along the height of the interior by a common distance with the first support member, the second support member including a respective guide section that extends in the orientation along the height of the interior, the guide section of the second support member defining a respective transition surface that provides bend radius protection at the cable port, wherein the transition surfaces of the first and second support members curve away from each other.
 23. A telecommunications closure comprising: a base holding a plurality of optical adapters layered in a plurality of rows, the base also defining an access opening, each optical adapter defining opposite first and second ports; a cover that cooperates with the base to define an interior having a height, a width, and a depth that are transverse to each other, the rows of the optical adapters extending along the width of the interior, the cover being movable relative to the base between an open position and a closed position, the cover blocking access to the optical adapters through the access opening when in the closed position, the cover allowing access to the optical adapters through the access opening when in the open position, the cover having an inner surface and an opposite outer surface, the inner surface of the cover facing the base and the outer surface of the cover facing away from the base when the cover is disposed in the closed position, the cover and the base also cooperating to define a cable port that is aligned with the first port of the optical adapter; and a plurality of support members carried by the inner surface of the cover to move with the cover between the open and closed positions, each support member being offset from the first port of the optical adapter along the height of the interior and each support member partially overlapping the first port of at least one respective one of the optical adapters in each row along the width of the interior, wherein outer ones of the support members partially overlap only one of the optical adapters of each row and inner ones of the support members partially overlap two of the optical adapters of each row. 